I'm currently booked for a flight from LAX to CTS with a layover in HND on a JAL codeshared flight with AA. Due to some updated scheduling from JAL, AA felt it prudent to update my itinerary so now the first leg of my flight will be landing in HND at 5am while the 2nd leg doesn't take off until 5pm. I tried to see if I could get the 2nd leg changed to an earlier flight but AA says it can't do anything and I've never been able to get in contact with JAL. So I guess I was wondering if when I land in Haneda, would I be able to go to the JAL counter and ask to be moved to an earlier flight or will the flight being codeshared keep me stuck on it?